Question

7. Six bells commence tolling together and toll at intervals of 3, 6, 9, 12, 15, 18 seconds
respectively. In 1 hr. 30 mins., how many times do they toll together?
O (a)31
O (b)28
O (c) 29
O (d)32​

Answer 1

Answer:

Solution

So, the bells will toll together after every 120 seconds(2 minutes).